isahint.c revision 144985 
1/*-
2 * Copyright (c) 1999 Doug Rabson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/isa/isahint.c 144985 2005-04-13 03:26:24Z mdodd $");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/kernel.h>
33#include <sys/bus.h>
34#include <sys/module.h>
35#include <isa/isavar.h>
36#include <machine/resource.h>
37
38static void
39isahint_add_device(device_t parent, const char *name, int unit)
40{
41	device_t	child;
42	int		sensitive, start, count;
43	int		order;
44
45	/* device-specific flag overrides any wildcard */
46	sensitive = 0;
47	if (resource_int_value(name, unit, "sensitive", &sensitive) != 0)
48		resource_int_value(name, -1, "sensitive", &sensitive);
49
50	if (sensitive)
51		order = ISA_ORDER_SENSITIVE;
52	else
53		order = ISA_ORDER_SPECULATIVE;
54
55	child = BUS_ADD_CHILD(parent, order, name, unit);
56	if (child == 0)
57		return;
58
59	start = 0;
60	count = 0;
61	resource_int_value(name, unit, "port", &start);
62	resource_int_value(name, unit, "portsize", &count);
63	if (start > 0 || count > 0)
64		bus_set_resource(child, SYS_RES_IOPORT, 0, start, count);
65
66	start = 0;
67	count = 0;
68	resource_int_value(name, unit, "maddr", &start);
69	resource_int_value(name, unit, "msize", &count);
70	if (start > 0 || count > 0)
71		bus_set_resource(child, SYS_RES_MEMORY, 0, start, count);
72
73	if (resource_int_value(name, unit, "irq", &start) == 0 && start > 0)
74		bus_set_resource(child, SYS_RES_IRQ, 0, start, 1);
75
76	if (resource_int_value(name, unit, "drq", &start) == 0 && start >= 0)
77		bus_set_resource(child, SYS_RES_DRQ, 0, start, 1);
78
79	if (resource_disabled(name, unit))
80		device_disable(child);
81
82	isa_set_configattr(child, (isa_get_configattr(child)|ISACFGATTR_HINTS));
83}
84
85static void
86isahint_identify(driver_t *driver, device_t parent)
87{
88	int i;
89	static char buf[] = "isaXXX";
90	const char *dname;
91	int dunit;
92
93	/*
94	 * Add all devices configured to be attached to parent.
95	 */
96	sprintf(buf, "isa%d", device_get_unit(parent));
97	i = 0;
98	while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
99		if (strcmp(dname, "atkbd") == 0)
100			continue;	/* old GENERIC kludge */
101		isahint_add_device(parent, dname, dunit);
102	}
103
104	/*
105	 * and isa?
106	 */
107	i = 0;
108	while ((resource_find_match(&i, &dname, &dunit, "at", "isa")) == 0) {
109		if (strcmp(dname, "atkbd") == 0)
110			continue;	/* old GENERIC kludge */
111		isahint_add_device(parent, dname, dunit);
112	}
113}
114
115static device_method_t isahint_methods[] = {
116	/* Device interface */
117	DEVMETHOD(device_identify,	isahint_identify),
118
119	{ 0, 0 }
120};
121
122static driver_t isahint_driver = {
123	"hint",
124	isahint_methods,
125	1,			/* no softc */
126};
127
128static devclass_t hint_devclass;
129
130DRIVER_MODULE(isahint, isa, isahint_driver, hint_devclass, 0, 0);
131